- Secretary-General’s message on World Cities Day 2021
- Secretary-General’s message on the United Nations Day
- Secretary-General’s written message on the International Day for the Eradication of Poverty
- Secretary-General's video message for World Food Day
- Secretary-General’s message on the International Day of the Girl
- Secretary-General’s message on World Mental Health Day 2021
- Secretary-General’s message on World Post Day 2021
- Secretary-General’s message on World Habitat Day 2021
- Secretary-General’s message on the International Day of Non-Violence
- Secretary-General’s message on the International Day of Older Persons
- Secretary-General’s written message on World Tourism Day 2021: “Tourism for inclusive growth”
- Secretary-General’s message for the International Day for the total Elimination of Nuclear Weapons
